Searching for a faux leather supplier - advice appreciated

Hi! I am not sure exactly where to ask but hoped this sub would have some wisdom regarding suppliers or even have manufacturers in here themselves.

I want to make my own traveler's journal out of vegan leather but I can't find a supplier that is UK based with material that is thick enough. I think I would need something that is between 1.5 and 2mm thick.

I am looking to buy enough to make a couple of journals for myself and potentially more for Christmas presents. I want to avoid using Amazon and would prefer to purchase from a UK manufacturer, however, I am really struggling to find one.

Any pointers would be really appreciated. Thank you in advance!